edge04

any thoughts or anyone running the 295x18's all around? these would be on 18x10.5 rims on a base C6

NVM, found an thread where lots of people running that.

mikeCsix

I ran them last year. They seem to work pretty well, I've seen -1.2g's in sweepers. They seem to like a little more pressure, I'm still experimenting. When pressurized new maximum (about 42psi), the heat and go away quickly. I've since learned to keep the pressures down to 35psi(hot) and that seems to help a lot.

AngryJ

First HPDE (NCM Park) on stock size Pilot Super Sports and I couldn't be happier with them. Camber is 1.5 front / 1.0 rear and pressure ranged from 37-40 psi. Tires inspired confidence and talked to me the entire time. Good grip from warm up lap to 10th lap. I could feel when the tires got hotter after a few hard laps in a row. The response went down a bit but the grip went up, especially in turns 18-20 near the sink hole. Only time the back end got away from me was when I swung wide on turn 10 and hit the water trailing across the track. Excellent turn in as well which led to a very balanced car. Everything stock with the Z51 package. I didn't check tread depth before and after, but there definitely isn't a noticable wear difference like with my pads and rotors. Would highly recommend these tires if you're looking for an all around street/autocross/light track tire.

trackboss

Is the super sport or pilot sport ps2 a better tire (grip)? I am looking for the best street performance tires that may see occasional track use. Michelin seems to be the go to tire for the sizes I need (345/30-19 and 275/35-18). I am not opposed to using toyo r888. While I am interested in dry grip I want a tire that will work well in rain and not be dangerous in the wet.

Hat_Trick_Hokie

Based on the reviews here and from others, this is exactly why I just ordered four 295/18 MPSS to run on C5Z rears. I'll be weekend/around town cruising, driving to/from events, instructor HPDE sessions, and even some NASA TT laps (I don't plan on being competitive). I have trailered and done Hoosier and Conti scrubs the past few years, but I'm getting back into the arrive and drive life.

First event May 2-3 at VIR with a 600mile round trip drive. I'll report back.

AngryJ

Wet grip on the PSS is great. Can't vouch for the PS2's. Tirerack has a nice comparison for this range of tires.

trackboss

Thanks for the feedback. I noticed that going to a 325/30-19 opens up a lot more options. Is the Michelin still the preferred tire over Dunlop, Continental, Hankook, Bridgestone, Goodyear?

troyguitar

For possible occasional track use I'd stick with the PSS. The RE-11 is the only other tire I'd look at but only if you were going to track more often, they're pretty harsh on the street due to very stiff sidewalls.

dbratten

As an informational followup to my previous post here's where we were on Saturday at the Tour. Due to disqualification of all C4-C7 Corvettes by SCCA National Staff (addressed in the NorCal Forum) I did not run on Sunday (as others did not) to provide complete results. But, I didn't find the PSS tires to be a disadvantage.

--Dan

2015 Crows Landing Championship Tour
April 17-19, 2015

**** UNOFFICIAL RESULTS (INFORMATIONAL ONLY) ****

PRONTO TIMING SYSTEM

Class standings for CAMS [13 Cars] (01:18:48 PM)

-----------------------------------------------------------------------
T 1 118 Scott Fraser 1966 Ford 427 Cobra Bridges
60.194 61.734(1) 60.126 60.126

-----------------------------------------------------------------------
T 2 7 Dan Bratten 2006 Chevrolet Corvette Micheli
63.380 61.869 61.101 61.101
(0.975)
-----------------------------------------------------------------------
T 3 132 Brian Hobaugh 2003 Chevrolet Corvette Falken
61.140 DNF 61.828 61.140
(0.039)
-----------------------------------------------------------------------
T 4 88 Richard Willhoff 2006 Chevrolet Corvette BFGoodr
62.046 61.951 61.323 61.323
(0.183)
-----------------------------------------------------------------------
5 77 Kenneth Mitchell 1989 Chevrolet Corvette BFGoodr
DNF 62.995 61.339 61.339
(0.016)
-----------------------------------------------------------------------
6 18 Bruce Cambern 1966 Ford 427 Cobra Bridges
DNF 61.734(1) 68.208(2) 61.734
(0.395)
-----------------------------------------------------------------------
7 3 Bryan Stewart 2004 Chevrolet Z06 Falken
DNF 62.549 61.840 61.840
(0.106)
-----------------------------------------------------------------------
8 89 sean breese 1989 Chevrolet Corvette Hoosier
63.533 DNF 64.972(1) 63.533
(1.693)
-----------------------------------------------------------------------
9 189 Tom Kubo 1989 Chevrolet Corvette Hoosier
DNF 64.664 63.873 63.873
(0.340)
-----------------------------------------------------------------------
10 32 Steve Hobaugh 2003 Chevrolet Corvette Falken
65.507 DNF 65.572(1) 65.507
(1.634)
-----------------------------------------------------------------------
11 49 Dave Thomas 2007 Chevrolet Corvette Toyo
DNF DNF 69.567 69.567
(4.060)
-----------------------------------------------------------------------
12 44 Rick Brunetti 1999 Chevrolet Corvette Falken
DNF DNF DNF No Time

-----------------------------------------------------------------------
13 55 Carrie Willhoff 2015 Chevrolet Corvette Micheli
DNF DNF DNF No Time

Evolution-ary

What pressures are you running? I have ended up starting at 25 f/24 r, after experimenting a bit on the higher side (which didn't work for me at all, no grip), ending up around 34/33 hot ....

I found them to be very good when new, but even then, I thought they went away very quickly when hot and pushing it fairly hard (compared to R6's anyway) - but having said that, at Streets of Willow, I was only a half sec or so off my R6 times when new ... pretty impressive, and to me better, a much better choice than the NTO5's I previously ran as street/track tire ....

FASTFATBOY

295/35 with my foot on it, 275/35 in front.

That's a LARGE tire for a 295/35, tread measures almost 12 inches.

mikeCsix

I'm keeping mine at 35 hot so far, I'm watching the shoulder of the tires and slowly reduce pressure. The Poesche guys run about the same. They also don't recommend run flats on track days and the Michelin PSS'S is also a popular tire for them.

cagotzmann

Here are my tire readings during a open lapping session at Spring Mountain 2.6 Mile Layout.

Car is a 2015 C7 Z51 with Super Sport Tires.

The people at Spring Mountain have certainly tested what pressure / temp are best for these cars in the nevada desert. This day the air temp was about 77 F.



This data was collected via the on board PDR (performance data recorder) and Cosworth Toolbox for GM.

racebum

pss is a wonderful street tire. grip is very consistent over the life and a full 4 year life should be easily do-able

the comment about best street/rec track tire is where i fall in opinion as well

tires are good in the cold, excellent in the wet, good in the dry and can handle moderate track time

one part that hasn't been touched on is how their "lack" of grip compared to slicks is actually a good thing for a stockish c5/6/7

the lack of grip prolongs drivetrain life, is easier on brakes and MUCH easier on the drivetrain and hubs. suspension will also feel correct. slicks on a stock car can often bring about the loveboat feeling and that's not even counting all the other cons regarding part life

racebum

re11 isn't all that bad, the main drawback is they only last about 60% as long, are quite a bit worse in the wet and produce a bit more noise for people who notice such things. cold weather performance is also under the pss. it's close cousin the ad08 behaves much the same way.

the big benefit of these is a bit more grip when hot and a bit more resistance to scrubbing

NVR2L8

I start the first session at 30F and 28R. I come back in at 34-36, and lower the pressures as necessary throughout the day.

Soloontario

With Rivals, I have found my front pressures to consistently gain 7-9 lb (while the car was understeering badly and I was likely overdriving it). OTOH, with a more balanced car on RS3s, I still find a minimum of 7 lb pressure gain per session. Will be interesting to see what happens with the PSS tires.

NTMD8R

Having participated in 5 Autocross events with my C7 Z51 since last August, I have some definite thoughts on the PSS tires.

Now, I live in the Vancouver BC area, so WEATHER is very contributory.
In August, temperatures were about 18 deg C and sunny day, and the tires were AWESOME.
In September, temps were about 5 deg C and cloudy, and the tires were terrible. No grip at all.

In January this year, same conditions as last event, except also was rain, tires were terrible.

In Feb this year, about 10 deg C, cloudy, tires were adequate, but not great.

Last Saturday (April 18), temp was 18 deg C, nice and warm, tires were great. Good stick.

Yesterday, temp started at 7 deg C, standing water on track. Tires were terrible... no stick at all.
The day warmed up, had some sunshine and about 15 deg C in afternoon, and tires improved considerably.
Pavement got warm, and car set FTD (a PCA event).

So... my conclusion....
When the temps are nice and warm, these tires are GREAT.
When the temps are cold (below 10 deg C), they are not.

I have ordered Toyo R888s to replace them.

trackboss

For those of you who have experience running these tires aggressively on the road course what are your thoughts on alignment?
In my case the fronts will be much smaller than the rears (275/35-18 vs. 345/30-19) and the car has near stock C5 z06 horsepower. My current spring rates work well with hoosier R6 (295/315) so the front may be a bit over sprung for the super sports and the rear under sprung.

AngryJ

I'd recommend running the alignment specs by Pfadt (link below). I'm running 1.5F (245 width) and 1.0R (285 width) and am very pleased with the bite and balance through corners. I've done about 10 autocross events with those tires/alignment and 1 track day at NCM. I've also put about 8,000 miles on the car and still have even tread wear.

http://www.pfadtracing.com/blog/wp-c...-9.12.2011.pdf